pentecostal, adj. & n.
--adj. (also pentecostal)
1 of or relating to Pentecost.
2 of or designating Christian sects and individuals who emphasize the gifts of the Holy Spirit, are often fundamentalist in outlook, and express religious feelings by clapping, shouting, dancing, etc.
--n. a Pentecostalist.
Pentecostalism n. Pentecostalist adj. & n.